Is that true? On this lens, the autofocus doesn't work? Does anyone have experience with this combination? I've been thinking of getting it. TIA. 
canonloader Cream of the Crop  More info | Nov 05, 2006 12:56 | #1 Is that true? On this lens, the autofocus doesn't work? Does anyone have experience with this combination? I've been thinking of getting it. TIA. Mitch- ____...^.^...____
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Woolburr Rest in peace old friend.  66,487 posts Gallery: 115 photos Best ofs: 2 Likes: 143 Joined Sep 2005 Location: The Tupperware capitol of eastern Oregon...Leicester, NC! More info | Nov 05, 2006 13:00 | #2 It is true...with a 2x TC the lens becomes f/11 at 800mm. F/8 will autofocus on a 1 series body, f/5.6 for other bodies... so with a 2x TC...there is no autofocus for the 100-400. People that know me call me Dan
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crn3371 Cream of the Crop  7,198 posts Likes: 2 Joined Mar 2005 Location: SoCal, USA More info | Nov 05, 2006 13:02 | #3 As far as I know, only a 1 series body will auto focus above f5.6 . I've heard that with a 1.4x converter on a 30D that auto might work, but with a lot of hunting.
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Billginthekeys Billy the kid  7,359 posts Likes: 2 Joined Nov 2005 Location: Islamorada, FL More info | Nov 05, 2006 16:54 | #4 it will focus with a 1.4x on 1series bodies only. and it wont autofocus on anything with the 2x. the results are less than stellar aswell. Mr. the Kid.
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Nov 05, 2006 18:04 | #5 OK, thanks guys. Mitch- ____...^.^...____
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akhater Member  163 posts Joined Sep 2006 Location: On earth, unfortunately More info | Nov 05, 2006 18:08 | #6 out of experience, with a 30D if you are using the "cheap" converters (the ones that doesn't transmit f stops to the camera) the camera will still TRY to AF. with a 1.4x autofocus will still work and it is quite usable in good light, in low light it will haunt. 2.0x autofocus is almost impossible. All Day I Dream About Photography
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